Aircon compressor cutting in/out
Aircon compressor cutting in/out
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Discussion

21TonyK

Original Poster:

13,179 posts

236 months

Having replaced the compressor (which I was told was the cause of the leak), the condenser (which was old, bent and corroded) and the seals I have ice cold aircon in my old 2010 mini.

However, every 40-60 seconds and only when driving, there is a click and the rpm blips up or down. Exactly the same as it would if you switch the aircon on or off.

When the car is sitting at idle its fine, rock steady rpm with the aircon on or off (about 700 or 900 rpm).

Its not really noticable driving but in traffic (which is most of its use) its very noticeable and irritating, gaining or losing power as you drive.

Before the new bits where put in and the system regassed it all ran smoothly albeit with lukewarm aircon.

Anything obvious to check? Am I right in thinking if it was pressure it would do it at idle as well?

finlo

4,430 posts

230 months

21TonyK said:
Having replaced the compressor (which I was told was the cause of the leak), the condenser (which was old, bent and corroded) and the seals I have ice cold aircon in my old 2010 mini.

However, every 40-60 seconds and only when driving, there is a click and the rpm blips up or down. Exactly the same as it would if you switch the aircon on or off.

When the car is sitting at idle its fine, rock steady rpm with the aircon on or off (about 700 or 900 rpm).

Its not really noticable driving but in traffic (which is most of its use) its very noticeable and irritating, gaining or losing power as you drive.

Before the new bits where put in and the system regassed it all ran smoothly albeit with lukewarm aircon.

Anything obvious to check? Am I right in thinking if it was pressure it would do it at idle as well?
Probably cycling on and off as it's meant too as it's achieving temp due to airflow when moving.

Panamax

9,039 posts

61 months

21TonyK said:
Having replaced the compressor (which I was told was the cause of the leak), the condenser (which was old, bent and corroded) and the seals I have ice cold aircon in my old 2010 mini.
So how did you re-gas it? Have you got the right quantity and pressure in there?

21TonyK

Original Poster:

13,179 posts

236 months

Panamax said:
21TonyK said:
Having replaced the compressor (which I was told was the cause of the leak), the condenser (which was old, bent and corroded) and the seals I have ice cold aircon in my old 2010 mini.
So how did you re-gas it? Have you got the right quantity and pressure in there?
Dare I say it... Kwikfit.

Link to their report/pics...

https://external.mycarsvhc.co.uk/kwikfit/20743117/...

The only -'ve on the report was...



Which wasnt mentioned and means nothing to me frown

Edited by 21TonyK on Monday 6th July 21:44

stevemcs

10,119 posts

120 months

Turn the ac off and see what happens, although I suspect as above it’s just the compressor kicking in and out.

21TonyK

Original Poster:

13,179 posts

236 months

stevemcs said:
Turn the ac off and see what happens, although I suspect as above it s just the compressor kicking in and out.
Yeah with the AC off its steady.

E-bmw

12,922 posts

179 months

Yesterday (08:30)
quotequote all
All correct then, it should be cycling the fan/compressor regularly as it gets to/exceeds the desired temperature.

21TonyK

Original Poster:

13,179 posts

236 months

Yesterday (09:06)
quotequote all
In which case I'll carry on with my other R56... should be done by lunch.


21TonyK

Original Poster:

13,179 posts

236 months

Yesterday (09:08)
quotequote all
Issue with the one thats done is it does it from start up. Ie start the car and at idle its fine but by the time you have driven 100 yards its kicking in and out every 40 seconds.

I'll test again when I get a day to play with it but it may be the temp sensor playing up?

21TonyK

Original Poster:

13,179 posts

236 months

Yesterday (10:42)
quotequote all
Just realised I didn't mention its manual aircon, not climate so you don't set a target temp. Just a wheel for hot or cold... so barbaric.



Off to get the other one gassed at lunch so I'll mention it and see what they say.